clay/handlebars

'use strict';
/**
 * overwrite default handlebars 'if' helper
 * this adds support for an inline helper, `{{if foo bar}}` _(if foo is truthy, print bar)_
 * as well as an inline if/else helper, `{{if foo bar else=baz}}` _(if foo is truthy, print bar. otherwise, print baz)_
 * @param  {*} conditional to check for truthiness
 * @param  {*} value       to print if conditional is truthy
 * @param  {object} [options]
 * @return {string} if inline, otherwise calls block functions
 */
module.exports = function (conditional, value, options) {
  if (options === undefined) {
    // only two arguments! behave like default handlebars if helper
    options = value;

    return conditional ? options.fn(this) : options.inverse(this);
  } else {
    // do the new inline behavior
    if (conditional) {
      return value;
    } else {
      return options.hash.else || ''; // return falsy value or emptystring
    }
  }
};

module.exports.example = {
  code: '{{ if true "bar" else="baz" }}',
  result: '"bar"'
};